Preparation device for epoxy resin multi-effect compound flame retardant

Abstract

The utility model relates to the technical field of preparation and mixing of epoxy resin compound flame retardants, in particular to a preparation device for epoxy resin multi-effect compound flame retardants, which comprises a preparation kettle, a stirring device, a stirring device and a control system. The compounding and mixing mechanism is used for carrying out multi-section compounding on epoxy resin and is arranged in the preparation kettle; wherein the compounding and mixing mechanism comprises a first motor fixedly mounted at the top of the preparation kettle; during use, added epoxy resin and various flame retardants can be mixed through the multi-section mixing assembly, and the mixed flame retardants and contact materials are subjected to vibration mixing during mixing, so that the mixing effect is effectively improved, the mixed flame retardants and epoxy resin can be filtered in sections, materials which are not completely fused in the mixing process flow back, and the flame retardants and the epoxy resin are uniformly mixed. The quality of a finished product is effectively improved through secondary mixing, and the vibration assembly can continuously vibrate the filtering part during filtering, so that the filtering efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of preparation and mixing of epoxy resin compound flame retardants, in particular to a preparation device for epoxy resin multi-effect compound flame retardants. Background Art

[0002] Epoxy resin is a type of thermosetting polymer synthetic material with excellent bonding, corrosion resistance, insulation, moldability, and high strength. It also possesses superior mechanical, electrical, thermal, and chemical resistance properties. However, its greatest drawback in application is its flammability, a common problem with most polymer materials. This drawback significantly limits its application. In response to this situation, flame-retardant epoxy resin materials have emerged.

[0003] As shown in the reference case "Epoxy resin flame retardant preparation device" announcement number "CN214439054U", while adding raw materials into the tank body, iron impurities mixed in the raw materials can be removed, effectively improving the production quality of epoxy resin flame retardant.

[0004] The preparation of existing epoxy resin compounded flame retardants typically requires mixing epoxy resin with multiple flame retardants in a reactor. However, during the compounding process, the flame retardants are prone to agglomeration, resulting in uneven dispersion and affecting the final flame retardant effect.

[0005] Therefore, a preparation device for epoxy resin multi-effect compound flame retardant is proposed to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to solve the above-mentioned problem by providing a preparation device for epoxy resin multi-effect compound flame retardant. The preparation process of epoxy resin compound flame retardant improves the problem that epoxy resin and multiple flame retardants usually need to be mixed in a reactor during the compounding process. However, during the compounding process, the flame retardants are prone to agglomeration, resulting in uneven dispersion, which in turn affects the final flame retardant effect.

[0007] The utility model achieves the above-mentioned purpose through the following technical solutions: a preparation device for epoxy resin multi-effect compound flame retardant, comprising: a preparation kettle, the outer side of which is fixedly installed with a support foot; a compounding and mixing mechanism, wherein the compounding and mixing mechanism for performing multi-stage compounding of the epoxy resin is arranged inside the preparation kettle; wherein the compounding and mixing mechanism comprises a first motor fixedly installed on the top of the preparation kettle, the output end of the first motor is provided with a multi-stage mixing component, and the interior of the preparation kettle is provided with a vibration component. When in use, the added epoxy resin and multiple flame retardants can be mixed by the multi-stage mixing component and vibrated and mixed with the contact materials during mixing, thereby effectively improving the mixing effect, and the mixed flame retardant and epoxy resin can be filtered in sections, and the materials that are not completely fused during the mixing process can be refluxed for secondary mixing to effectively improve the quality of the finished product. The vibration component can continuously vibrate the filter component during filtration, thereby improving the filtration efficiency.

[0008] Preferably, the multi-stage mixing assembly includes a driving rod fixedly installed on the output end of the first motor, two guide frames are fixedly installed inside the preparation kettle, a filter plate is arranged between the two guide frames, the filter plate is fixedly connected to the inner wall of the preparation kettle, the filter plate is arranged obliquely, and multiple mixing plates are arranged on the top of the guide frame. During preparation, epoxy resin and a variety of flame retardants can be introduced into the interior of the preparation kettle, and the driving rod is started by the first motor. The driving rod synchronously drives the multiple mixing plates to rotate to mix and prepare the epoxy resin and the multiple flame retardants inside. The prepared material falls on the surface of the filter plate for filtration, and then falls to the multiple mixing plates below for multi-stage mixing preparation.

[0009] Preferably, the multi-stage mixing assembly also includes a reflux pipe arranged on one side of the preparation kettle, a feed pipe is fixedly installed on one side of the reflux pipe, the feed pipe is fixedly connected to the preparation kettle, and the feed pipe is located on one side of the filter plate, and a discharge pipe is fixedly installed on the other side of the reflux pipe, the discharge pipe is fixedly connected to the preparation kettle, a dragon rod is rotatably installed inside the reflux pipe, a second motor is fixedly installed on the top of the reflux pipe, the second motor is fixedly connected to the dragon rod, the material blocked by the filter plate moves to the inside of the reflux pipe through the feed pipe, and then the dragon rod is started to rotate by the second motor to transport the unfused material inside the reflux pipe, and move it to the top of the upper multiple mixing plates for re-mixing.

[0010] Preferably, two connecting frames are fixedly installed on the surface of the driving rod, and the two connecting frames are respectively located between multiple mixing plates on one side of the two guide frames. The connecting frames are located between multiple mixing plates on the same side, and a movable rod is fixedly installed on one side of the multiple mixing plates. The multiple movable rods are used in conjunction with adjacent connecting frames. When the driving rod rotates, the multiple connecting frames are synchronously driven to rotate, and the multiple connecting frames are synchronously driven to rotate the corresponding movable rods, and the multiple movable rods are synchronously driven to rotate the corresponding mixing plates to mix the internal epoxy resin and multiple flame retardants.

[0011] Preferably, a fixed plate is fixedly installed between the guide frames on one side, and a fixed rod is fixedly installed on the top of the fixed plate, and the top of the fixed rod passes through the interior of the fixed rod and extends into the interior of the two connecting frames at the same time, and two fixed blocks are fixedly installed on the surface of the fixed rod, and the two fixed blocks are respectively located in the interior of the two connecting frames, and a plurality of contact blocks are fixedly installed on the surface of the fixed block, and a plurality of guide tubes are installed on the surface of the connecting frame, and the plurality of movable rods are respectively slidably connected to the plurality of guide tubes, and a spring is fixedly installed on the surface of the movable rod, and the other end of the spring is fixedly connected to the inner wall of the guide tube, and one end of the movable rod is located on one side of the plurality of contact blocks. During mixing, the connecting frame rotates outside the fixed block. When the connecting frame rotates, it can synchronously drive one end of the plurality of movable rods between the plurality of contact blocks, so that the movable rod continuously slides back and forth inside the guide tube. When the movable rod moves, the corresponding spring can be automatically reset by the spring after the movable rod moves, thereby continuously mixing, ensuring that the epoxy resin and multiple flame retardants always remain fluid and evenly dispersed during the mixing process, effectively improving the mixing efficiency.

[0012] Preferably, the contact block is set to a semicircular shape, and the end of the movable rod located inside the connecting frame is set to a semicircular shape. The semicircular contact block and the semicircular end face of the movable rod improve the force uniformity during the transmission process and reduce the mechanical wear caused by uneven force.

[0013] Preferably, stirring plates are fixedly installed on both sides of the mixing plate, and the two stirring plates are both arranged in a triangular shape. The tips of the triangular stirring plates can disturb the mixed material when rotating, effectively breaking up the flame retardant that may be aggregated, and avoiding material deposition or agglomeration.

[0014] Preferably, the two guide frames are located on the same vertical line, and the guide frames are configured to be funnel-shaped, so that the material can flow smoothly under the action of gravity.

[0015] Preferably, the vibration assembly includes a reciprocating screw fixedly mounted on the surface of a fixed rod, a telescopic sleeve fixedly mounted on the surface of the driving rod, a movable plate fixedly mounted on the surface of the telescopic sleeve, the movable plate being slidably mounted on the surface of the reciprocating screw, and impact rods fixedly connected on both sides of the movable plate, which synchronously drives the movable plate to rotate when the driving rod rotates, allowing the movable plate and the reciprocating screw to perform threaded motion, so that the movable plate can drive the corresponding impact rod to continuously impact and vibrate the filter plate to accelerate the filtration of the surface material.

[0016] Preferably, the impact rod is arranged at the bottom of the filter plate, and the top ends of the two impact rods are arranged in a semicircular shape. The impact rod is located at the bottom of the filter plate, and can continuously clean the filter holes during the impact and vibration process to prevent flame retardant particles and resin from clogging the filter plate, ensuring that the filtration process is unobstructed.

[0017] The beneficial effects of the utility model are:

[0018] 1. During use, the added epoxy resin and various flame retardants can be mixed through a multi-stage mixing component and vibrated with the contact materials during mixing, thereby effectively improving the mixing effect. The mixed flame retardant and epoxy resin can be filtered in sections, and the materials that are not completely fused during the mixing process can be refluxed for secondary mixing to effectively improve the quality of the finished product. The vibration component can continuously vibrate the filter component during filtration, thereby improving the filtration efficiency;

[0019] 2. When the driving rod rotates, the movable plate is driven to rotate synchronously, so that the movable plate and the reciprocating screw perform threaded motion, so that the movable plate can drive the corresponding impact rod to continuously impact and vibrate the filter plate to accelerate the filtration of the surface material. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 It is a structural diagram of the utility model;

[0022] Figure 3 It is a structural diagram of the utility model;

[0023] Figure 4 for Figure 3 A magnified view of middle A;

[0024] Figure 5 This is a schematic diagram of the structure of the vibration component of the utility model;

[0025] Figure 6 This is a schematic diagram of the fixed rod and reciprocating screw structure of the utility model.

[0026] In the figure: 1. preparation kettle; 2. support leg; 3. compound mixing mechanism; 31. first motor; 311. second motor; 32. multi-stage mixing assembly; 321. driving rod; 322. guide frame; 323. filter plate; 324. reflux pipe; 325. feed pipe; 326. discharge pipe; 327. mixing plate; 328. fixed plate; 329. fixed rod; 3210. fixed block; 3211. contact block; 3212. connecting frame; 3213. guide tube; 3214. movable rod; 3215. spring; 3216. dragon rod; 3217. stirring plate; 33. vibration assembly; 331. reciprocating screw; 332. telescopic sleeve; 333. movable plate; 334. impact rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] When implementing: Figure 1-6 As shown, a preparation device for epoxy resin multi-effect compound flame retardant includes: a preparation kettle 1, a support leg 2 is fixedly installed on the outside of the preparation kettle 1; a compounding and mixing mechanism 3, the compounding and mixing mechanism 3 for multi-stage compounding of epoxy resin is arranged inside the preparation kettle 1; wherein, the compounding and mixing mechanism 3 includes a first motor 31 fixedly installed on the top of the preparation kettle 1, and a multi-stage mixing component 32 is provided at the output end of the first motor 31. A vibration component 33 is provided inside the preparation kettle 1. When in use, the added epoxy resin and multiple flame retardants can be mixed by the multi-stage mixing component 32 and vibrated and mixed with the contact materials during mixing, thereby effectively improving the mixing effect, and the mixed flame retardant and epoxy resin can be filtered in sections, and the materials that are not completely fused during the mixing process can be refluxed for secondary mixing to effectively improve the quality of the finished product. The vibration component 33 can continuously vibrate the filter component during filtration, thereby improving the filtration efficiency.

[0029] like Figure 2 、 Figure 3 、 Figure 4 and Figure 6As shown, the multi-stage mixing assembly 32 includes a driving rod 321 fixedly mounted on the output end of the first motor 31, two guide frames 322 are fixedly mounted inside the preparation kettle 1, a filter plate 323 is provided between the two guide frames 322, the filter plate 323 is fixedly connected to the inner wall of the preparation kettle 1, the filter plate 323 is arranged obliquely, and a plurality of mixing plates 327 are provided on the top of the guide frame 322. During preparation, epoxy resin and a variety of flame retardants can be introduced into the interior of the preparation kettle 1, and the driving rod 321 is started by the first motor 31, and the driving rod 321 synchronously drives the plurality of mixing plates 327 to rotate. The epoxy resin and various flame retardants inside are mixed and prepared. The prepared materials fall on the surface of the filter plate 323 for filtration, and then fall to the multiple mixing plates 327 below for multi-stage mixing preparation. The multi-stage mixing assembly 32 also includes a return pipe 324 arranged on one side of the preparation kettle 1. A feed pipe 325 is fixedly installed on one side of the return pipe 324. The feed pipe 325 is fixedly connected to the preparation kettle 1, and the feed pipe 325 is located on one side of the filter plate 323. A discharge pipe 326 is fixedly installed on the other side of the return pipe 324. The discharge pipe 326 is fixedly connected to the preparation kettle 1. The return pipe 324 A dragon rod 3216 is installed for rotation inside, and a second motor 311 is fixedly installed on the top of the return pipe 324. The second motor 311 is fixedly connected to the dragon rod 3216. The material blocked by the filter plate 323 moves to the inside of the return pipe 324 through the feed pipe 325, and then the dragon rod 3216 is started to rotate by the second motor 311 to transport the unfused material inside the return pipe 324 and move it to the top of the multiple mixing plates 327 on the upper side for re-mixing. Two connecting frames 3212 are fixedly installed on the surface of the driving rod 321. The two connecting frames 3212 are respectively located on the two guide plates. Between the multiple mixing plates 327 on one side of the frame 322, the connecting frame 3212 is located between the multiple mixing plates 327 on the same side. A movable rod 3214 is fixedly installed on one side of the multiple mixing plates 327. The multiple movable rods 3214 are used in conjunction with adjacent connecting frames 3212. When the driving rod 321 rotates, the multiple connecting frames 3212 are synchronously driven to rotate, and the multiple connecting frames 3212 are synchronously driven to rotate the corresponding movable rods 3214, and the multiple movable rods 3214 are synchronously driven to rotate the corresponding mixing plates 327 to mix the internal epoxy resin and multiple flame retardants.

[0030] like Figure 3 、 Figure 4 and Figure 6As shown, a fixing plate 328 is fixedly installed between the guide frames 322 on one side, a fixing rod 329 is fixedly installed on the top of the fixing plate 328, the top of the fixing rod 329 passes through the interior of the fixing rod 329 and extends to the interior of the two connecting frames 3212 at the same time, two fixing blocks 3210 are fixedly installed on the surface of the fixing rod 329, the two fixing blocks 3210 are respectively located in the interior of the two connecting frames 3212, a plurality of contact blocks 3211 are fixedly installed on the surface of the fixing block 3210, a plurality of guide tubes 3213 are installed on the surface of the connecting frame 3212, a plurality of movable rods 3214 are respectively slidably connected to the plurality of guide tubes 3213, and a spring 3215 is fixedly installed on the surface of the movable rod 3214, and the other end of the spring 3215 The movable rod 3214 is fixedly connected to the inner wall of the guide tube 3213, and one end of the movable rod 3214 is located on one side of the multiple contact blocks 3211. During mixing, the connecting frame 3212 rotates outside the fixed block 3210. When the connecting frame 3212 rotates, it can synchronously drive the multiple movable rods 3214 to move one end between the multiple contact blocks 3211, so that the movable rod 3214 continuously slides back and forth inside the guide tube 3213. When the movable rod 3214 moves, the corresponding spring 3215 is synchronously squeezed. The spring 3215 can automatically reset after the movable rod 3214 moves, thereby continuously mixing, ensuring that the epoxy resin and the multiple flame retardants always remain fluid and evenly dispersed during the mixing process, effectively improving the mixing efficiency;

[0031] The contact block 3211 is set to a semicircular shape, and the end of the movable rod 3214 located inside the connecting frame 3212 is set to a semicircular shape. The semicircular contact block 3211 and the semicircular end surface of the movable rod 3214 improve the force uniformity during the transmission process and reduce the mechanical wear caused by uneven force. Stirring plates 3217 are fixedly installed on both sides of the mixing plate 327. The two stirring plates 3217 are set to a triangular shape. The tip of the triangular stirring plate 3217 can disturb the mixed material during rotation, effectively breaking up the flame retardant that may be aggregated, and avoiding material deposition or agglomeration. The two guide frames 322 are located on the same vertical line, and the guide frame 322 is set to a funnel shape. The funnel-shaped guide frame 322 allows the material to flow smoothly under the action of gravity.

[0032] like Figure 2 and Figure 5As shown, the vibration assembly 33 includes a reciprocating screw 331 fixedly mounted on the surface of the fixed rod 329, a telescopic sleeve 332 fixedly mounted on the surface of the driving rod 321, a movable plate 333 fixedly mounted on the surface of the telescopic sleeve 332, and the movable plate 333 slidably mounted on the surface of the reciprocating screw 331. Both sides of the movable plate 333 are fixedly connected with a striking rod 334. The reciprocating screw 331 is in the form of two thread grooves with the same pitch and opposite rotation directions, and the two ends are connected by a transition curve. Through the rotation of the reciprocating screw 331, the side of the spiral groove pushes the slider placed in the spiral groove to make axial reciprocating motion. When the rod 321 rotates, the movable plate 333 is synchronously driven to rotate, so that the movable plate 333 and the reciprocating screw 331 perform threaded motion, so that the movable plate 333 can drive the corresponding impact rod 334 to continuously impact and vibrate the filter plate 323 to accelerate the filtration of the surface material. The impact rod 334 is arranged at the bottom of the filter plate 323, and the top ends of the two impact rods 334 are both set to a semicircular shape. The impact rod 334 is located at the bottom of the filter plate 323, and can continuously clean the filter holes during the impact and vibration process to prevent flame retardant particles and resin from clogging the filter plate 323, thereby ensuring that the filtration process is unobstructed.

[0033] When the utility model is in use, during preparation, epoxy resin and a variety of flame retardants can be introduced into the interior of the preparation kettle 1, and the driving rod 321 can be started by the first motor 31. When the driving rod 321 rotates, the multiple connecting frames 3212 are synchronously driven to rotate, so that the multiple connecting frames 3212 synchronously drive the corresponding movable rods 3214 to rotate, and the multiple movable rods 3214 synchronously drive the corresponding mixing plates 327 to rotate. During mixing, the connecting frame 3212 rotates outside the fixed block 3210. When the connecting frame 3212 rotates, it can synchronously drive the multiple movable rods 3214 to move one end between the multiple contact blocks 3211, so that the movable rods 3214 continuously slide back and forth inside the guide tube 3213. When the movable rods 3214 move, the corresponding springs 3215 can be synchronously squeezed to move by the springs. The spring 3215 automatically resets after the movable rod 3214 moves, thereby continuously mixing to ensure that the epoxy resin and various flame retardants always remain fluid and evenly dispersed during the mixing process, effectively improving the mixing efficiency. When the driving rod 321 rotates, the movable plate 333 is synchronously driven to rotate, allowing the movable plate 333 and the reciprocating screw 331 to perform threaded motion, so that the movable plate 333 can drive the corresponding impact rod 334 to continuously impact and vibrate the filter plate 323 to accelerate the filtration of the surface material. The material blocked by the filter plate 323 moves to the inside of the return pipe 324 through the feed pipe 325, and then the second motor 311 is used to start the rotation of the dragon rod 3216 to transport the unfused material inside the return pipe 324 and move it to the top of the multiple mixing plates 327 on the upper side for re-mixing.

[0034] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A preparation device for epoxy resin multi-effect compound flame retardant, characterized in that: include: A preparation kettle (1), wherein a support leg (2) is fixedly mounted on the outer side of the preparation kettle (1); A compounding and mixing mechanism (3) for compounding the epoxy resin in multiple stages is arranged inside the preparation kettle (1); The compounding and mixing mechanism (3) comprises a first motor (31) fixedly mounted on the top of the preparation kettle (1), a multi-stage mixing assembly (32) is provided at the output end of the first motor (31), and a vibration assembly (33) is provided inside the preparation kettle (1).

2. The preparation device for epoxy resin multi-effect compound flame retardant according to claim 1, characterized in that: The multi-stage mixing assembly (32) includes a driving rod (321) fixedly mounted on the output end of the first motor (31); two guide frames (322) are fixedly mounted inside the preparation kettle (1); a filter plate (323) is provided between the two guide frames (322); the filter plate (323) is fixedly connected to the inner wall of the preparation kettle (1); the filter plate (323) is obliquely arranged; and a plurality of mixing plates (327) are provided on the top of each of the guide frames (322).

3. The preparation device for epoxy resin multi-effect compound flame retardant according to claim 1, characterized in that: The multi-stage mixing assembly (32) further comprises a return pipe (324) arranged on one side of the preparation kettle (1); a feed pipe (325) is fixedly mounted on one side of the return pipe (324); the feed pipe (325) is fixedly connected to the preparation kettle (1), and the feed pipe (325) is located on one side of the filter plate (323); a discharge pipe (326) is fixedly mounted on the other side of the return pipe (324); the discharge pipe (326) is fixedly connected to the preparation kettle (1); a dragon rod (3216) is rotatably mounted inside the return pipe (324); a second motor (311) is fixedly mounted on the top of the return pipe (324); and the second motor (311) is fixedly connected to the dragon rod (3216).

4. The device for preparing a multi-effect compound flame retardant for epoxy resin according to claim 2, characterized in that: Two connecting frames (3212) are fixedly mounted on the surface of the driving rod (321), and the two connecting frames (3212) are respectively located between a plurality of mixing plates (327) on one side of the two guide frames (322). The connecting frame (3212) is located between a plurality of mixing plates (327) on the same side. A movable rod (3214) is fixedly mounted on one side of the plurality of mixing plates (327), and the plurality of movable rods (3214) are used in conjunction with adjacent connecting frames (3212).

5. The device for preparing a multi-effect compound flame retardant for epoxy resin according to claim 4, characterized in that: A fixing plate (328) is fixedly installed between the guide frames (322) on one side, a fixing rod (329) is fixedly installed on the top of the fixing plate (328), the top of the fixing rod (329) passes through the interior of the fixing rod (329) and extends to the interior of the two connecting frames (3212) at the same time, two fixing blocks (3210) are fixedly installed on the surface of the fixing rod (329), the two fixing blocks (3210) are respectively located in the interior of the two connecting frames (3212), and the fixing blocks (321 0) is fixedly mounted with a plurality of contact blocks (3211), a plurality of guide tubes (3213) are mounted on the surface of the connecting frame (3212), a plurality of movable rods (3214) are slidably connected to the plurality of guide tubes (3213) respectively, and a spring (3215) is fixedly mounted on the surface of the movable rod (3214), the other end of the spring (3215) is fixedly connected to the inner wall of the guide tube (3213), and one end of the movable rod (3214) is located on one side of the plurality of contact blocks (3211).

6. The device for preparing a multi-effect compound flame retardant for epoxy resin according to claim 5, characterized in that: The contact block (3211) is configured in a semicircular shape, and one end of the movable rod (3214) located inside the connection frame (3212) is configured in a semicircular shape.

7. The device for preparing a multi-effect compound flame retardant for epoxy resin according to claim 4, characterized in that: Stirring plates (3217) are fixedly mounted on both sides of the mixing plate (327), and the two stirring plates (3217) are both arranged in a triangular shape.

8. The device for preparing a multi-effect compound flame retardant for epoxy resin according to claim 4, characterized in that: The two guide frames (322) are located on the same vertical line, and the guide frames (322) are configured in a funnel shape.

9. The device for preparing a multi-effect compound flame retardant for epoxy resin according to claim 4, characterized in that: The vibration assembly (33) includes a reciprocating screw (331) fixedly mounted on the surface of a fixed rod (329), a telescopic sleeve (332) fixedly mounted on the surface of the driving rod (321), a movable plate (333) fixedly mounted on the surface of the telescopic sleeve (332), the movable plate (333) slidably mounted on the surface of the reciprocating screw (331), and impact rods (334) fixedly connected to both sides of the movable plate (333).

10. The device for preparing a multi-effect compound flame retardant for epoxy resin according to claim 9, characterized in that: The impact rods (334) are arranged at the bottom of the filter plate (323), and the top ends of the two impact rods (334) are both arranged in a semicircular shape.

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